[PATCH v2 0/3] cpufreq:boost: CPU Boost mode support
From: Lukasz Majewski <hidden>
Date: 2013-06-11 09:04:23
Also in:
lkml
This patch series introduces support for CPU overclocking technique called Boost. It is a follow up of a LAB governor proposal. Boost is a LAB component: http://thread.gmane.org/gmane.linux.kernel/1484746/match=cpufreq Boost unifies hardware based solution (e.g. Intel Nehalem) with software oriented one (like the one done at Exynos). For this reason cpufreq/freq_table code has been reorganized to include common code. Important design decisions: - Boost related code is compiled-in unconditionally and disabled by default The cpufreq_driver is responsibile for providing low_level_boost callback - struct cpufreq_driver has been extended with boost related fields - Boost sysfs attributies are seen only when cpufreq driver supports them. They will not show up until either cpufreq_driver defines low_level_boost callback or device tree's cpufreq "boost_mode" attribute is defined. - No special spin_lock for Boost was created. The one from cpufreq_driver was reused. - Low level boost trigger function (*low_level_boost function callback) is necessary to "glue" together acpi-cpufreq boost with software based one. Tested at: HW: Exynos 4412 3.10 linux Exynos 4210 3.10 linux Compile tested x86_64 defconfig (acpi) - help with HW (Intel Nehalem) test needed Two patches were abandoned (comparing to v1): [PATCH 1/5] cpufreq: Define cpufreq_set_drv_attr_files() to add per CPU sysfs attributes [PATCH 5/5] cpufreq:boost:Kconfig: Enable boost support at Kconfig For detailed changelog please look into relevant patches Lukasz Majewski (3): cpufreq:boost: CPU frequency boost code unification for software and hardware solutions cpufreq:acpi:x86: Adjust the acpi-cpufreq.c code to work with common boost solution cpufreq:exynos:Extend Exynos cpufreq driver to support boost framework drivers/cpufreq/acpi-cpufreq.c | 72 ++++++++++++++------------------------ drivers/cpufreq/cpufreq.c | 69 ++++++++++++++++++++++++++++++++++++ drivers/cpufreq/exynos-cpufreq.c | 49 ++++++++++++++++++++++++-- drivers/cpufreq/freq_table.c | 57 ++++++++++++++++++++++++++++-- include/linux/cpufreq.h | 12 +++++++ 5 files changed, 209 insertions(+), 50 deletions(-) -- 1.7.10.4